Churn-dasher



No. 6l5,l54. Patented Nov. 29, 1898.

E. A. FRANKLIN. CHURN DASHER.

(Application vfiled June 16, 1898...)

(No Model.)

8 5 J T u 47 6' fp'i' UNITED STATES PATENT FFICEEe EDWVARD A. FRANKLIN, OF AUSTIN, TEXAS, ASSIGNOR TO THE CHICAGO NOVELTY MANUFACTURING COMPANY, OF JERSEY CITY, NEIV JERSEY.

CHURN-DASHER.

SPECIFICATION forming part of Letters Patent No. 615,154, dated November 29, 1898. Application filed June 16, 1898- Serial No. 683,614. (No model.)

To a whom it may concern:

Be it known that I, EDWARD A. FRANKLIN, a citizen of the United States, residing at Austin, in the county of Travis and State of Texas, have invented a new and useful Churn- Dasher, of which the following is a specification.

My invention relates to churns, and particularly to churn-dashers, and has for its object to provide an cxhausting-dasher wherein the exhaust is radial and wherein the dasherdisk carries a cylindrical wall constituting, in connection with a dasher-disk, a rotary vessel arranged within the churn-receptacle, whereby as the liquid is radially exhausted from the interior of the vessel at a point in the plane of the dasher-disk it enters the vessel by falling inwardly over the upper edge thereof to cause an intermingling of air with the liquid contents of the churn-receptacle, and hence a rapid separation of the butter.

Further objects and advantages of this invention will appear in the following description, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1 is a sectional view of a churn mechanism, showing a dasher constructed in accordance with my invention. Fig. 2 is a top plan view of the dasher-disk. Fig. 3 is an inverted plan view of the same. Fig. 4 is a detail view of a portion of the dasher-disk.

Similar numerals of reference indicate corresponding parts in all the figures of the drawin gs.

Rising from a base 1 is a standard 2, in which is mounted the spindle 3 of. a drivinggear 4. Carried by the standard at its upper end is an arm 5, overhanging the base, and mounted parallel withthe spindle 3 is a spindle 6, provided at one end with a bevel-gear 7 and at the other end with a pinion 8, meshing with said driving-gear. The bevel-gear 7 is secured in place upon the spindle 6 by means of a set-screw 9.

The base supports a churn-receptacle 10, having in its bottom a socket 11, in which is stepped the lower end of a dasher-spindle 12, and said spindleis provided at its upper end with a socket 13 for the reception of an adjustable center-pin 14, arranged in a vertical opening 15 at the extremity of the overhanging arm 5 and secured in place by means of a set-screw 16. The dasher-spindle' carries a bevel-gear 17, which meshes with the bevelgear 7 and is secured at the desired ad justment by means of a set-screw 18.

The dasher embodying my invention consists of a disk 19, from the center of which rises a sleeve 20, fitted for vertical adjustment upon the dasher-spindle and provided contiguous to its upper end with a set-screw 21, whereby the dasher may be secured at the desired adjustment upon the spindle, and a cylindrical wall 22 rising from the periphery of said dasher-disk and combining with' the disk to form a vessel approximating the churn-receptacle in diameter and adapted to receive the liquid contents of the churn-receptacle by the inward flowing of such liquid over the upper edge of the cylindrical wall, the adjustment of the dasher upon the spindle being such that when the contents of the receptacle are at rest the upper edge of the cylindrical wall is above the surface of the liquid.

As above indicated, an object of my invention is to provide a dasher of the hollow or vessel type, from which the. liquid contents may be exhausted at a point near its bottom to cause the rising of the liquid between the exterior wall of the vessel and the wall of the receptacle, whereby the vessel receives the liquid over its upper edge, and I am aware that this operation, broadly speaking, has been attained by mechanisms heretofore devised. I have found in practice, however, that downwardly-exhausting dashers of this type are open to objections, of which one is that the centrifugal impulse imparted to the liquid contents of the vessel prevents the efficient downward exhaustion through openings provided in the bottom of the vessel. Therefore I have devised a laterally-exhaustin g vessel of which the bottom, consisting of the dasher-disk 19, is provided with a series of segmentally-curved radially-disposed ribs 23, extending from a point contiguous to the axis of the disk to the periphery thereof, each rib being enlarged at its outer end, as shown at 24, and having its outer side curved in c0nformity to the periphery of the disk to form a bearing for the wall 22. Between these ribs the upper surface of the dasher-disk is depressed to form cavities 25, which decline outwardly and at the same time are enlarged toward the periphery of the disk and are bounded laterally by the adjacent ribs. At or near the center of the disk the floors of the cavities rise to the plane of the upper edges of the ribs, and from these points said floors decline'gradually to the periphery of the disk and terminate in a plane below the lower edge of the cylindrical wall 22, thus providing between the floors of the cavities and said lower edge of the vessel a series of outlet-slots 26, through which the contents of the vessel may be discharged centrifugally. This discharge of the liquid is increased in violence by the fact that the curvature of the ribs is rearward with relation to the direction of rotation of the dasher when in operation. In other words, each rib at its inner end is disposed approximately radially, and from an intermediate point it curves rearwardly and outwardly, whereby the front wall of each cavity is concaved, while the rear wall is convexed. The construction of the dasher-disk at its under side is reversed to form radiallycurved grooves 23, which decline rearwardly with relation to the direction of rotation of the disk from the axis to the periphery of the latter, whereby each groove is convexed forwardly and concaved rearwardly, while between the grooves 23 are dmvnwardlyconvexed enlargements 25, correspondingin contour with the cavities in the upper surface of the dasherdisk. The effect of this under-surface construction of disk is to agitate and impart centrifugal motion to the liquid beneath the dasher, whereby no portion of the contents of the churn-receptacle remains at rest during the operation of the dasher.

I have found in practice that with a dasher constructed as described the liquid is discharged from the interior thereof with rapid ity and violence, and hence is caused to mount between the cylindrical wall of the vessel and the side of the receptacle inwardly over the upper edge of said vessel-wall with a considerable admixture of air,which obviously hastens the separation of the butter.

A further advantage of the construction described resides in the fact that the dasherdisk may be stamped from sheet metal by the use of suitably-faced dies, whereby the cost of manufacture is reduced to the minimum. It will be understood that the object in providing means for adjusting the dasher vertically upon the dasher-spindle is to insure the arrangement of the upper edge of the cylindrical wall of the vessel above the surface of the contents of the receptacle, whereby the exhaustion of the contents of the vessel is necessary in order to raise the level of the liquid between the walls of the vessel and receptacle sufficiently to pass inwardly over the upper edge of the vessel-wall.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of this invention.

Having described my invention, what I claim is l. A churn-dasher consisting of adisk provided with radial ribs and intermediate depressions, extending radially to the periphery of the disk, and a cylindrical wall carried by the disk with its lower edge spaced from the plane of the floors of said depressions, at the periphery of the disk, to form outlet-openings, substantially as specified.

2. A churn-dasher consisting of a vessel of which the bottom is provided with interior radial ribs and intermediate depressions with which communicate openings in the wall of the vessel in the plane of said depressions, substantially as specified.

3. A churn-dasher consisting of a disk provided at its upper surface with a series of radial segmentally-curved ribs, and intermediate outwardly-enlarged cavities of which the floors decline outwardly, anda cylindrical wall carried by the disk with its lower edge spaced above the plane of the outer portions of the floors of the cavities to form outletopenings, substantially as specified.

4. A churn-dasher consisting of a disk of which the upper surface is provided with a series of radial segmentally-curved ribs enlarged at their outer ends to form rests or seats coincident with the periphery of the disk, and the disk also having cavities between said ribs, and a cylindrical wall fitted upon said rests or seats with its lower edge above the plane of the contiguous portions of the floors of the cavities to form outlet-slots, substantially as specified.

5. A churn-dasher comprising a disk provided at its upper surface with a series of radially-curved ribs which are deflected rearwardly toward their outerends, and intermediate depressions, enlarged toward the periphery of the disk and having concaved front and convexed rear walls, the floors of said cavities declining toward the periphery of the disk, and provided at its under side with a series of radial segmentally-curved grooves coextensive with said ribs, and interposed downwardly-convexed enlargements coextensive with said cavities, and a cylindrical wall secured to the outer ends of said ribs and spaced at its lower edge above the plane of the contiguous portions of the floors of the cavities to form outlet-openings, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

EDWARD A. FRANKLIN.

Witnesses:

E. R. FRANKLIN, JOHN D. JACKSON. 

